Extensions Docs Server: Generalize $ref's to work for any schema node

chrome/common/extensions/docs/server2/template_data_source.py

Index: chrome/common/extensions/docs/server2/template_data_source.py
diff --git a/chrome/common/extensions/docs/server2/template_data_source.py b/chrome/common/extensions/docs/server2/template_data_source.py
index e219564701be414fd7d3605c77b208fdfe08b1f1..c6e363c9345eec7ff4948c92a26e0790ce266cf3 100644
--- a/chrome/common/extensions/docs/server2/template_data_source.py
+++ b/chrome/common/extensions/docs/server2/template_data_source.py
@@ -67,12 +67,13 @@ class TemplateDataSource(object):
       branch_info = self._branch_info.copy()
       branch_info['showWarning'] = (not path.startswith('apps') and
                                     branch_info['showWarning'])
+      samples_data_source = self._samples_data_source_factory.Create(request)
       return TemplateDataSource(
           branch_info,
-          self._api_data_source_factory.Create(request),
+          self._api_data_source_factory.Create(request, samples_data_source),
           self._api_list_data_source_factory.Create(),
           self._intro_data_source_factory.Create(),
-          self._samples_data_source_factory.Create(request),
+          samples_data_source,
           self._known_issues_data_source,
           self._cache,
           self._public_template_path,